Let us now recall from [1]} how one obtains a priori \(L_1^2\)  bounds on \((B,\Psi )\)  on solutions in Coulomb gauge to the equations which are only assumed to be \(L^2_1\)  to begin with (any such solution turns out to be smooth, as recalled below). Our goal later will be to make (parts of) the estimates explicit. The steps are the following.
